import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.applet.Applet;

 public class Poordvordeline extends Applet implements ActionListener{
double A=0;
  TextField a=new TextField(""+0);
  Button nupp=new Button(" OK ");

  public Poordvordeline(){
   setLayout(null);
    a.setBounds(340, 5, 30, 20);
    nupp.setBounds(410, 5, 40, 20);
    add(a);
    add(nupp);
    nupp.addActionListener(this);
  }

  public void paint(Graphics g){
   g.setColor(Color.blue);
     g.drawString("y =", 320, 20);
     g.drawString("/x", 375, 20);

  for(int i=0; i<20; i++){
	g.setColor(Color.gray);
	g.drawLine(0+30*i, 0, 0+30*i, 600);		//y- telge pidi
	g.drawLine(0, 0+30*i, 600, 0+30*i);		//x- telge pidi
  }
//teljestik
	g.setColor(Color.black);
	g.drawLine(300, 0, 300, 600);		//y- telg
	g.drawLine(0, 300, 600, 300);		//x- telg
  for(int i=0; i<20; i++){
	g.drawLine(0+i*30, 295, 0+i*30, 305);	//x- telg kriipsud
	g.drawLine(295, 0+i*30, 305, 0+i*30);	//y- telg kriipsud
	for(int nr=0; nr<10; nr++){
		g.drawString(nr-10+"", 305, 600-nr*30);
		g.drawString(nr+1+"", 305, 270-nr*30);
		g.drawString(nr+1+"", 330+nr*30, 295);
		g.drawString(nr-10+"", 0+nr*30, 295);
		g.drawString(0+"", 305, 295);
	}
  }
//teljestiku osa lõpp

//graafiku joonistamine
g.setColor(Color.blue);
    double vanax=0;
    double vanay=300-(A/-300*900);
   for(int d=-300; d<=300; d++){
      double uusx=300+d;
      double uusy=300-(A/d*900);
//Graphics2D ga=(Graphics2D)g;
//    GeneralPath gp=new GeneralPath();
//    gp.append(new Line2D.Double(vanax, vanay, uusx, uusy), false);
//    ga.draw(gp);
      if((300-vanay)*(300-uusy)>0){
         g.drawLine((int)vanax, (int)vanay, (int)uusx, (int)uusy);
      }
      vanax=uusx;
      vanay=uusy;
  }
}
  public void actionPerformed(ActionEvent e){
    A=Double.parseDouble(a.getText().replace(',', '.'));
    repaint();
  }

  public static void main(String argumendid[]){
    Frame f=new Frame("Poordvordeline");
    f.add(new Poordvordeline());
    f.setSize(600, 600);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent e){
        System.exit(0);
      }
    });
  }
}